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EWG's Tap Water Database — 2021 UPDATE

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Dibromochloromethane

Clear Brook City MUD

Dibromochloromethane, one of the total trihalomethanes (TTHMs), is formed when chlorine or other disinfectants are used to treat drinking water. Dibromochloromethane and other disinfection byproducts increase the risk of cancer and may cause problems during pregnancy. Click here to read more about disinfection byproducts.

MORE ABOUT THIS CONTAMINANT

 

112

Samples

0

Samples exceeding legal limit (MCL)

90

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20145.57 ppb1817ND - 27.8 ppb
20154.97 ppb19191.10 ppb - 14.5 ppb
20161.88 ppb199ND - 11.0 ppb
20174.13 ppb19191.50 ppb - 20.6 ppb
20181.19 ppb1813ND - 3.10 ppb
20192.54 ppb1913ND - 17.0 ppb

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.1 ppb

The EWG Health Guideline of 0.1 ppb for dibromochloromethane was proposed in 2018 by the California Office of Environmental Health Hazard Assessment as a one-in-a-million lifetime risk of cancer. Values greater than one-in-a-million cancer risk level can result in increased cancer cases above one in a million people.

ppb = parts per billion

All test results

Date Lab ID Result
2014-01-31AC41030ND
2014-02-27AC450241.70 ppb
2014-02-27AC450223.00 ppb
2014-02-27AC450374.20 ppb
2014-02-27AC450214.00 ppb
2014-05-21AC549561.20 ppb
2014-05-21AC549403.70 ppb
2014-05-21AC549413.50 ppb
2014-05-21AC549753.10 ppb
2014-05-21AC548802.70 ppb
2014-09-29AC6848410.00 ppb
2014-09-29AC6846327.8 ppb
2014-09-29AC6846210.00 ppb
2014-09-29AC684812.40 ppb
2014-11-20AC726455.60 ppb
2014-11-20AC726464.90 ppb
2014-11-20AC726486.80 ppb
2014-11-20AC726775.60 ppb
2015-02-18AC809964.60 ppb
2015-02-18AC8099410.00 ppb
2015-02-18AC809761.30 ppb
2015-02-18AC8093310.2 ppb
2015-02-18AC809112.60 ppb
2015-02-18AC809353.80 ppb
2015-02-18AC809125.70 ppb
2015-05-20AC9276514.5 ppb
2015-05-20AC927661.10 ppb
2015-05-20AC927641.10 ppb
2015-05-20AC9276712.3 ppb
2015-07-17AD001281.80 ppb
2015-07-17AD001261.40 ppb
2015-07-17AD001371.20 ppb
2015-07-17AD000878.30 ppb
2015-11-20AD144022.90 ppb
2015-11-20AD144012.40 ppb
2015-11-20AD144182.20 ppb
2015-11-20AD144107.10 ppb
2016-01-22AD19723ND
2016-01-22AD19651ND
2016-01-22AD19655ND
2016-01-22AD19620ND
2016-01-22AD19624ND
2016-04-06AD320976.20 ppb
2016-04-06AD3210911.0 ppb
2016-04-06AD32035ND
2016-04-06AD32018ND
2016-04-06AD32032ND
2016-04-06AD320425.00 ppb
2016-07-11AD43518ND
2016-07-11AD435571.10 ppb
2016-07-11AD43520ND
2016-07-11AD435541.20 ppb
2016-10-28AD552743.90 ppb
2016-10-28AD552752.00 ppb
2016-10-28AD552762.50 ppb
2016-10-28AD552772.90 ppb
2017-01-06AD635914.30 ppb
2017-01-06AD635292.80 ppb
2017-01-06AD635282.20 ppb
2017-01-06AD635312.30 ppb
2017-01-06AD635335.60 ppb
2017-04-10AD789804.30 ppb
2017-04-10AD7897210.00 ppb
2017-04-10AD789352.50 ppb
2017-04-10AD789372.50 ppb
2017-04-10AD789382.30 ppb
2017-04-10AD789363.10 ppb
2017-07-14AD894352.50 ppb
2017-07-14AD894382.30 ppb
2017-07-14AD894372.30 ppb
2017-07-14AD894393.20 ppb
2017-10-17AE010612.70 ppb
2017-10-17AE010621.50 ppb
2017-10-17AE010631.50 ppb
2017-10-17AE0107220.6 ppb
2018-02-23AE154852.10 ppb
2018-02-23AE15352ND
2018-02-23AE153511.10 ppb
2018-02-23AE153501.000 ppb
2018-02-23AE153491.10 ppb
2018-05-24AE27720ND
2018-05-24AE276591.000 ppb
2018-05-24AE276581.80 ppb
2018-05-24AE276571.80 ppb
2018-05-24AE276901.50 ppb
2018-08-09AE362772.00 ppb
2018-08-09AE362861.80 ppb
2018-08-09AE362653.10 ppb
2018-08-09AE362991.50 ppb
2018-11-13AE459061.60 ppb
2018-11-13AE45911ND
2018-11-13AE45910ND
2018-11-13AE45908ND
2019-01-29AE51971ND
2019-01-29AE51975ND
2019-01-29AE51877ND
2019-01-29AE51885ND
2019-01-29AE51878ND
2019-01-29AE51879ND
2019-04-04AE611991.10 ppb
2019-04-04AE611971.000 ppb
2019-04-04AE611931.000 ppb
2019-04-04AE612001.20 ppb
2019-07-18AE749991.000 ppb
2019-07-18AE749781.10 ppb
2019-07-18AE750141.10 ppb
2019-07-18AE750131.40 ppb
2019-10-17AE8688817.0 ppb
2019-10-17AE868903.30 ppb
2019-10-17AE868893.50 ppb
2019-10-17AE868913.60 ppb
2019-11-19AE8978712.0 ppb